That friend of mine that has the 49cc 2 stroke motor on a beach cruiser, had a spill or 2. The story was he was trippin on mushrooms (not good on a bike)and had finally put caliper brakes on it over the back fender. he had took out the coaster brake in the hub cause it kept catching and getting all fu@&ed up under the load of the engine, or cause he dont know how to work the damn clutch. but anyhow as he was riden the back fender brakes loose where the caliper brakes mount. and it goes under the tire and was sliding on it doing 35mph or so till he slid the pavement on his side with no shirt on, this happen a couple of houses down from me. he come up with road rash from the top of his jeans up to under his left arm, and other stuff. he took off the back fender and threw it away in my trash and left. i thought he might go home,right . no he goes out flying around more and the freaking front fender does the same thing, at wide open this time .fender between the tire and pavement once more.. I seen him yesterday with a cane barely able to stand up. i gave him a fiorecet or two so he could manage to sleep. jeez oh and somewhere he lost his muffler and had to back track till he found it. I`m like dude dont do the maintance on your bike shrooming or ride the damn thing.I think he will be getting a leather vest of sorts now.lol